you, your
尒 centers on the second person: you or your. It is a rare character for this concept, with no other major meaning clusters.
尒 is a variant form of 爾, which originally depicted a pattern or balance and was borrowed for the second-person pronoun. The simplified shape 尒 is rare and its exact historical development is uncertain.
The top looks like a person, and the bottom is 小 (small). Imagine pointing at a small person and saying 'you'.
For ジ, imagine pointing at someone and saying 'Gee, it's you!' — the 'Gee' sounds like ジ.